Use navigation in Google Maps - iPhone & iPad - Google Maps Help
https://support.google.com/maps/answer/3273406?hl=en&co=GENIE.Platform%3DiOS
Web ResultTo get easy, turn-by-turn navigation to places, use the Google Maps app. Maps shows you directions and uses real-time traffic information to find the best route to your destination. With voice navigation, you can hear traffic alerts, where to turn, which lane to use, and if there's a better route.
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